| Abbreviation | Definition |
|---|---|
| IITOS | Irish Institute for Trauma and Orthopaedic |
| IITS | Institute of Islamic and Turkish Studies |
| IITT | Involute Institute of Technical Training |
| IIU | Insurance Institute of Uganda |
| IIV | Indian Institution of Valuers |
| IIW | Indian Institute of Welding |
| IIW | International Institute of Welding |
| IIYM | International Institute for Young Musicians |
| IJ | Institute for Justice |
| IJA | Institute of Judicial Administration |
| IJAL | Institute For Japanese American Literature |
| IJCC | Institute for Japanese Culture and Classics |
| IJCR | Institute for Jewish and Community Research |
| IJCR | Institute for Jewish Catholic Relations |
| IJCR | Institute for Jewish Community Research |
| IJLS | Institute for Judicial and Legal Studies |
| IJLS | Institute of Judicial and Legal Studies |
| IJN | Institute Jantung Negara |
| IJS | Institute for Jewish Spirituality |
| IJS | Institute of Jewish Studies |